Furnace-roof construction



" i nml A"mljaccnt rcl'rnctory slmwhn'clfn UNITED STATESW PATENT OFFICE.

CHARLES E. BoNson, oF LORAIN, omo.`

FUnmrcE-Roori CONSTRUCTION.

Application filed September 19, 1918. Serial o. 254190.

/lle it knoivn that l, Comunas E. Boxon, H Cil-lilou nl thc VUnited States, nml 'resident o'fLoii'iin, in the county of Lorain nml Static of! Ollio', lnwe. invented certain new unil useful Improvements in Furnace-Roof Cnnstriu-tions, ol which the following isi 'ai spiicilicatiom- My invention relates to thc construction othc 4ti-'nilsversely arched roofs of melting, heating; zi-nnenlinggiuul `iniihufurnaces, nml more/partici|liirllv rvlntcs to the comtruction ofthe vskcwhock supports nml thc rcfr-ncmry skcnihuckhl uned in carrying sind transmitting the thrust of such nrchcl roofs to the sideivzilln nml liu-'lill frnmcwork of such l'urniiccs. Y

'lthnoy hei-n the gcuvrnl practice lli-retoiorc. in conf-lructinlg` ilu. roofs.' oflsrich fur- Iiziecsg which are nnulv 1F firc-hrirlf or similiir rfriictory materials. lo po-ition the hlkcwhilfrks :against lengthwise' luirimutnlv slcwhiicl .snpports' tfrumint'uiu thc ri-.lractoiyskcwhnchs iii place. unil prcvcnt downvizirfl moi/ornent thcreof rclntivc to the shewliiick supports. .Xftcr thrfurnnccs havo heen used for any consirlcmhlc timo4 the logwelcflgcs'r'f the" nuitnl skewhixck supporf'; hlun away, particularly :it points immciliz'itely alloro the door-ways in Unc or hoth of the furnncc'siilc walls. -'l`hc rcs-ult is that the ggkeyilh'tcks or 'n portion ol' the skmvlmclmv puff, :nul -criusgc grunft`linhilityof' fnrngce roofs in greatly lcngthenc of f portionsl nml, Sometimes off` the .Snchhhnppennigs nrc thecnuse rin thc operation of the fur-1 long del".

a refractory skcwhack infn/'rl skenhack V,qimil edges" the Another ohjcet of my invention is the provision in :in arched furnace roof of Skcwback sup/ports :ind coactiing nlewbacks having the novel constructions, arrangements and combination of parts shown in the drnwns, 6d

to be fullfgr described hercimiftcr, and m pnrticulzirlypointed out in thc appended claims.

Referring; now 'to the tional end elevation of n nrchefl vroot" formed 1:md constructed in vcntion.

furnace having an of refractory material, accordance with my in- Fig. 2 is n sectional end elevation, on a' 70 l-(Lrgfcr Scale` showing 'details in thefconstruction and 4nrmngement of skewbacks and skcwhnclr supports embodying my 'inrcntion- Fig. 3 in n perspective view showing fur- 75 plain showing a preferred form designates generally, :r furnace having 85 :m arched roof2. sigle walls 3 and 4, and a bottom 5, formed of refractory materials. 'l`l^iecnf'l.,r of thc roof' arch engage with and are supported on the inclined side faces 6 of my hacks Prlwing provided at caclr'side of the furnace andfhswiug oncjverticn] face `7 4in close contact-with tlxc'contiguoils`-faes 4of t e Skcnihnck siipports'. T .he She'wbacks 'B :irc notched in tical .Sirlc with the lower endth'ifeof to forni a. rnhhet, this rzibliet being provided to Areceive tlicinturncrl flange@ nnthe lower erige of the wbb 10.01: the skevifbncksupport *The outer vertical. face 7 Imc); 1also is provided with 'a transvrse slot or groove 11 therein to receive-.thc -rib or projection 'l2-m1 thccon'tiguous face of the k web of the skewbnck' support. G.

The wchLlO of the' skcwhnok support .C 4haS 10'5 9, 9,' on 1ts opposite.mair-u sup'port C bein r clrran'ncll shu'pd in `crestsection; Prefer'ab y the support Cxiill he made of cast metal Withjth web nml Hnges ofc. material'. tlliclmesi. to 110' drawings, forming piu-t of this ls pccifrntion, Figurer'l iS awsec- 65 supports constructed iri'accord- 8G improved skewbncks"B,` thev skewthc 'interncetion of the ver- 95 ofthe Skewl m0- i )rovidc considernble body in these supports.

hen preferred, however, n rolled steel channel or :t huilt up channel muy he used in forming the supports (I, insteud of n costing, as shown. The skewl'mck support (l nt an intermediate point in thc width of itsl web hns :t ril or projection 12, this ril ,having one lince 13 extending substantially nt right ongles to the lune ol` the inner surface oli the web of tie support. The other face 'lll of this projection 1'2 extends in a flut plane at :in oblique angle to that o'f the side surface 13, and the 4so-formed rib or irojection extends into and substantially iills the similarly shaped transverse lflfroove 1.1 in the contacting face of the skein-backs B. (See Figs. 2,3, 4, and 5).

In`building the furnaces, the skevvbuck supports C are bolted or otherwise fastened to the vertical buck-stays 1.5, these buck staysdieing used to hind the refractory sidewalls of the furnace in place. Each buckstny l5 is fastened at. its ends to the ends of un opposite buck-stay on the opposite side 0f the furnace by n horizontal tie-rod or bolt 16 in the usual and nell-known inanner, and ns the nntul framework of the furnace is generally a self-supporting structure, the lower ends of the buck-stays 15 vrill be 4.supported on and fastened to the over-hanging ends of the horizontal beams 17 thereof. The beams 17 are carried on u. suitable foundation, asis clearly shown in Fig. 1.

lVlie-n building the transversely arched roofs, the skewbucks D are placed in position against the skewback supports C with the lower fiange 9 and the projecting rib 12 of the skeivback support in the rabbet 8, und transverse -slot or roove 11 in the side ofthe ske-wbacks B. gI`he roof bricks are then put in place across the width of the furnace to form the arched roof 2, the thrust of the arch taken by theA skewbacks B and transmitted by the skewbacks to the skewhack supports C und .furnace-Walls 3 and 4. As shown the skevibacksupports and skewba-cks and buck-stays are capable of sup-` )orting the roofindependently of the' urnace. Walls 2, 3, although the side walls are built up until in close Acontrict with the ends of the arched'roof,.in the usual and well-known manner.

When, its occurs after extended use, the

lower flanges 9. on the skewback supports CA 4burn away, the rib 12 on the we of the skewbilck supp orts'securely holds the skewbecks B i'n position und prevents downward movement of the skewbncks relative to the slrewhack supports. v

The advantages of Inv invention. will he appreciated by those skilled in the art. constructing the skewbeck snppports and ske'bilcks as shown and described, the life of the refractory furnace roofs, of which 1 ,asoma in y improved skcwlmcks forni pin, is 'very nial'erially lcngtlnened und the cost of operating the furnaces greatly reduced.

Various xnodiliciitions inthe construction ol the skewlmclr supports und skewhueks nniylie made without departing from ni invention. The rib on the web of the sliewbnck supports may be bolted or otherwise fastened thereon instead of being forined integrali on the skt-:whack support ns shown, mid ot 1er changes nia be made within the `scope of ,the appendec claims.

l. In n metallurgical furnace having refractory side wells and an arched roof of refractory material, the combination with the skewbacks at the ends of the roof arch, of skewbuck supports engaging the sides of the skewbccks, said skewback supports be ing arranged to resist the thrust of said roof, and seid skewbacks and skewbeck supports hzwinp a plurality of registering pro- ]ections ant. grooves in the meeting faces thereofnrranged to oppose movement of the skevvibacks relative to said supports.

2. In n metallurgical furnace having refractory side walls und an arched roof of refractory materiel, the combination with the skewbucks et the ends of the roof arch, of skewback supports engaging the sides of the skewbacks and arranged to resist the thrust of said roof, said skewbacks having a. plurality of transverse grooves in the support side thereof and said skewbeck supports having projections thereon adapted to project into said grooves and prevent inovement of the skewbacks relative to the skewback supports.

3. In a metallurgical furnace having refractory side Wells and an. arched roof of refractor materiel,y the combination with the skew acks atlthe ends of the roof arch, of skewback supports engging the sides of the skewbacks underrun d to resist the thrust of said roof, said s ewbacks having` a plurality of transverse grooves in the sup'- port side thereof and said skewback supports having integral projections thereon adapted to project into` said grooves and prevent movement of the skewbacks relative to the skew'beck supports. 4 j i 4. In a metallurgical furnace, the combination with the skewbacks at the ends of the roof arch, of skewback supports .to .which the thrust of the roof arch 1s transmitted by saidv skewbacks, said skevvback supports comprising a. body orton channel shaped in cross section, :in havin a' rib formed integral .with 'the web of sai channel shaped body portion intermediate its flanges. l

5. -In u metallurgical furnace having refractory side walls und an arched roof cof refractory miiterial, the eombmatlon with 'the skewbacks at the ends of the roof arch,

of skewoack sllopoi'ts to which the thrust of the roof iii-ch is tranemitted by said skewhacke, Said skewhacks having a phiizihty of transverse groove, in one. laffe and said skewback supports having integral projectione` thereon adapted to enter said ,v {roovceV and oppose relative niofcie 1 said skmvbacks and ekewhark supports.

ln an arched fin-nace roof, the combination with the skuwharks at the ends of the roof arch, of skewhack supports to Wh ich the thi-1m of the roof arch is transmitted hy said slicwharks, `said 1-ke\\back summitM having a main supporting projection and :i supplemental projection. hoth of Said projet-tionsv havingr an interlocking engagenaent with said skcwhacks.

T. In a metallurgical furnace having eide walls and an arched roof4` the combination ot' rPfi'artm-.Y ski-n'haek-i at the ends of tlw roof aich. ot' hkewliavk ;-iupport.`v to which the thrnet of the roof arch is transmitted hy .said skewhafks. said Hkewhai-li support having the hottoin edge turni-l inwardly enlntantially at right angli-- to the weh thereof to form a main support and having; n projection on eaifl weh adapted lo engage in grooves in said kvwhafks and forni a lwzpplmnental support.

8, In an arched 'furnace root'. the combination with the ski-wbafrks at the ende of th'e roof arch. of Sliewhac'a imports to which the thrust of the, root' arch is franeA `riiitted by said slewbacks, said skewback supports comprising a. web portion, top and bottoni flanges extending inwardly at right angles lo said web portion, and a iih formed integral with and projecting inwai-diy from said web intermediate said flanges, Said bottoni flange and said rib havin' an interlocking engagement with said s ewbacks.

A skewback support comprising a weh portion, top and bottom flanges extending inwardly at right angles to said web porv tion` and a rib formed integral with said wel.: portion intermediate said flanges, the bottoni face of said rib extending at right anglee to theplane of the inner surface of' said web, and the other face thereof extend ing inwardl \"an l downwardly on an angle.

10, In a metallurgical furnace having an arched roof. the combination with the skewhafk's at the ends of the `roof arch, of skewha-"li f-,npporhA engaging the sides of the eltewha-'km aid skewhack supports comprisv ing a weh portion. top and hottom flanges excnsling inwardly at right angles to said weh 3 w1 ion. and an intermediate rib formed integral with the inner face of said web, the bottoni flange and said rib having interhH-lflnpj mmgeinent with Said skewbavks.

in hwtiinoirv whereof I have hereunto Set my hand.

(IHARLES E. BONSR. 

